A car airbag assembly

Abstract

The automotive airbag assembly provided by this invention is mounted on the steering wheel frame of a car. The airbag assembly includes a cover, a housing, an airbag assembly, and a horn conductive circuit assembly. The cover is connected to the housing, which is mounted on the steering wheel frame. The airbag assembly is positioned between the cover and the housing, and the horn conductive circuit assembly is mounted on the airbag assembly. This facilitates assembly. Compared to housing assemblies using sheet metal stamping and PA66 plastic coating, this invention reduces the complexity of housing assembly parts and molds, lowers the scrap rate of parts, effectively utilizes space, and avoids the horn conductive circuit assembly occupying a large space. It also improves the compactness of the automotive airbag assembly structure. The automotive airbag assembly provided by this invention has a compact structure, occupies little space, is easy to assemble, and has a high yield rate.

Description

Technical Field

[0001] This invention belongs to the field of automotive airbags, specifically, this invention relates to an automotive airbag assembly. Background Technology

[0002] With the development of the world economy, the automotive industry has also developed rapidly, and people's understanding of cars has become more and more extensive. Nowadays, people are paying more and more attention to the safety of cars. As an audio signal device for cars, the car horn is integrated with the driver's airbag. During the driving process, the driver can press the car airbag as needed and in accordance with regulations, so that the internal horn structure contacts the metal structure of the steering wheel, realizing the conduction of current and emitting the necessary audio signal to warn pedestrians and attract the attention of other vehicles, thus ensuring traffic safety.

[0003] In existing automobiles, the housing material of the driver's side airbag is usually made of PA66 injection molding. In order to integrate the car horn switch structure and the driver's side airbag, the horn circuit design usually involves first stamping the conductive sheet used to connect the horn circuit, and then encapsulating the conductive sheet in a plastic housing. This results in the driver's side airbag assembly occupying a large space, having high assembly difficulty, low yield, and high production cost. Summary of the Invention

[0004] This invention addresses the aforementioned problems and aims to provide a compact, space-saving, easy-to-assemble automotive airbag assembly with a high yield rate. To achieve this objective, the technical solution adopted by this invention is as follows:

[0005] The present invention provides an automotive airbag assembly, which is mounted on the steering wheel frame of an automobile and has the following features: a cover, a housing, an airbag assembly, and a horn conductive circuit assembly. The cover is connected to the housing, the housing is mounted on the steering wheel frame, the airbag assembly is mounted between the cover and the housing, and the horn conductive circuit assembly is mounted on the airbag assembly.

[0006] The automotive airbag assembly provided by this invention may also have the following features: the airbag assembly includes an airbag and a support ring bracket; the airbag is housed in a ring shape; a clearance space is left in the middle of the airbag; the support ring bracket is disposed in the clearance space; and a gas generator is provided on the support ring bracket.

[0007] The automotive airbag assembly provided by this invention may also have the following feature: studs are provided on the support ring bracket, and the studs are evenly distributed on the support ring bracket.

[0008] The automotive airbag assembly provided by the present invention may also have the following features: the housing is provided with a first through hole adapted to the stud, the stud passes through the first through hole, and a nut is provided at one end of the stud near the first through hole.

[0009] The automotive airbag assembly provided by this invention may also have the feature that the housing is provided with a second through hole.

[0010] The automotive airbag assembly provided by the present invention may also have the following features: the horn conductive circuit assembly includes a positioning pin, the positioning pin passes through the second through hole, one end of the positioning pin is provided with a support flange, one end of the positioning pin abuts against the airbag, and a shock-absorbing pad and a buffer spring pass through the positioning pin.

[0011] The automotive airbag assembly provided by this invention may also have the following features: the horn conductive circuit assembly further includes a conductive sheet and a wiring harness, the conductive sheet is disposed on a stud, one end of the wiring harness is connected to the stud, and the other end of the wiring harness is connected to a locating pin.

[0012] The automotive airbag assembly provided by the present invention may also have the following features: the conductive sheet includes a first convex plate, a second convex plate, and a connecting plate; one side of the connecting plate is connected to the first convex plate, and the other side of the connecting plate is connected to the second convex plate; a connecting ring is provided on the first convex plate, and the connecting ring is sleeved on the stud.

[0013] The automotive airbag assembly provided by this invention may also have the following feature: the housing is provided with an installation guide groove, and the connecting plate passes through the installation guide groove.

[0014] The automotive airbag assembly provided by this invention may also have the following feature: a retaining ring is provided on the steering wheel frame, and a locating pin abuts against the retaining ring.

[0015] The technical advantages of this invention are as follows: The automotive airbag assembly provided by this invention is mounted on the steering wheel frame of the car. The automotive airbag assembly includes a cover, a shell, an airbag assembly, and a horn conductive circuit assembly. The cover is connected to the shell, the shell is mounted on the steering wheel frame, the airbag assembly is positioned between the cover and the shell, and the horn conductive circuit assembly is mounted on the airbag assembly. This facilitates assembly. Compared with the shell assembly using sheet metal stamping and PA66 plastic coating process, it reduces the complexity of the shell assembly parts and molds, reduces the scrap rate of parts, effectively utilizes space, effectively avoids the horn conductive circuit assembly occupying a large space, and improves the structural compactness of the automotive airbag assembly.

[0016] Therefore, the automotive airbag assembly provided by this invention has a compact structure, occupies little space, is easy to assemble, and has a high yield rate. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 This is a schematic diagram of the structure of an automotive airbag assembly in an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is an exploded view of an automotive airbag assembly in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the shell structure in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the support ring bracket and the horn conductive circuit assembly in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the conductive sheet in an embodiment of the present invention. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the structure of the conductive sheet in an embodiment of the present invention. Figure 2 ;

[0024] Figure 7 This is a schematic diagram of the assembly of the conductive sheet and the housing in an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 A magnified view of part A in the middle;

[0026] Figure 9 yes Figure 8 Schematic diagram of the structure at section BB;

[0027] Figure 10 yes Figure 9 Schematic diagram of the CC section;

[0028] Figure 11 This is a schematic diagram of the steering wheel frame structure in an embodiment of the present invention;

[0029] Figure 12 This is a partial structural diagram of the steering wheel frame in a top view according to an embodiment of the present invention;

[0030] Figure 13 This is a partial structural diagram of the steering wheel frame in a bottom view according to an embodiment of the present invention.

[0031] The components in the diagram are labeled as follows: 1-Steering wheel frame, 2-Snap ring, 3-Barcode label, 10-Cover, 11-Identification groove, 12-Icon, 20-Housing, 21-First through hole, 22-Second through hole, 23-Mounting guide groove, 30-Airbag assembly, 31-Airbag, 32-Support ring bracket, 321-Stud, 322-Nut, 33-Gas generator, 331-Connecting convex plate, 40-Horn conductive circuit assembly, 41-Positioning pin, 411-Support flange, 412-Shock damping pad, 413-Buffer spring, 42-Conductive sheet, 421-First convex plate, 422-Second convex plate, 423-Connecting plate, 424-Connecting ring, 43-Wire harness. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0033] Figure 1 This is a schematic diagram of the structure of an automotive airbag assembly in an embodiment of the present invention. Figure 1 ; Figure 2 This is an exploded view of an automotive airbag assembly in an embodiment of the present invention.

[0034] like Figure 1 and Figure 2 As shown, the automotive airbag assembly provided by this invention is mounted on the steering wheel frame 1 of the vehicle. The automotive airbag assembly includes a cover 10, a housing 20, an airbag assembly 30, and a horn conductive circuit assembly 40. The cover 10 is connected to the housing 20, and the housing 20 is mounted on the steering wheel frame 1. The airbag assembly 30 is located between the cover 10 and the housing 20, and the horn conductive circuit assembly 40 is located on the airbag assembly 30. This facilitates assembly. Compared with the housing assembly using sheet metal stamping and PA66 plastic coating process, it reduces the complexity of the housing assembly parts and molds, reduces the scrap rate of parts, effectively utilizes space, effectively avoids the horn conductive circuit assembly 40 occupying a large space, and improves the structural compactness of the automotive airbag assembly.

[0035] The airbag assembly 30 includes an airbag 31 and a support ring bracket 32. The airbag 31 is housed in a ring shape between the cover 10 and the housing 20, with a clearance space in the middle of the airbag 31. The support ring bracket 32 ​​is set in the clearance space and can support the airbag assembly 30, so that the airbag 31 can be effectively housed between the cover 10 and the housing 20, effectively reducing the volume of the automotive airbag assembly and reducing the space occupied.

[0036] A gas generator 33 is installed on the support ring bracket 32. The gas generator 33 is connected to the airbag 31 and can inflate the airbag 31, thereby ensuring that the airbag assembly 30 can work normally and that the airbag can deploy normally in the event of a collision, effectively protecting the safety of the driver. Moreover, the gas generator 33 is located on the support ring bracket 32 ​​and in the clearance space, which further improves the space utilization and the compactness of the structure.

[0037] The support ring bracket 32 ​​is provided with studs 321, which are evenly distributed on the support ring bracket 32. The support ring bracket 32 ​​is square and has a flanged edge. The four studs 321 are respectively located at the four corners of the support ring bracket 32 ​​and are parallel to each other. The edge of the gas generator 33 is provided with connecting protrusions 331. The four connecting protrusions 331 are evenly distributed on the edge of the gas generator 33 and correspond one-to-one with the positions of the four studs 321. The connecting protrusions 331 are provided with connecting holes that are adapted to the studs 321. The studs 321 are inserted into the connecting holes to fix the car generator 33, prevent the car generator from shaking, and improve the stability of the structure.

[0038] Figure 3 This is a schematic diagram of the shell structure in an embodiment of the present invention;

[0039] like Figure 3 As shown, the housing 20 has a first through hole 21 adapted to the stud 321. The stud 321 passes through the first through hole 21. Four first through holes 21 are provided on the housing 20, each corresponding to one of the four studs 321. A nut 322 is provided at the end of the stud 321 near the housing 20. The nut 322 is screwed onto the stud 321 and abuts against the housing 20, thereby connecting the support ring bracket 32 ​​and the housing 20. The housing 20 has a groove in the middle adapted to the gas generator 33. The gas generator 33 is sleeved on the stud 321 through the connecting hole. The nut 322 is screwed onto the stud 321 and abuts against the housing 20, thereby fixing the gas generator 33 in the groove, located in the clearance space in the middle of the gas bag 31. The clearance space between the groove and the gas bag 31 provides installation space for the gas generator 33, further improving the compactness of the structure.

[0040] Figure 4 This is a schematic diagram of the structure of the support ring bracket and the horn conductive circuit assembly in an embodiment of the present invention.

[0041] like Figure 4As shown, the speaker conductive circuit assembly 40 includes positioning pins 41. The housing 20 is also provided with second through holes 22. Three second through holes 22 are provided on the housing 20, two of which are respectively provided on the two sides of the housing 20, and the other second through hole 22 is provided on the top of the housing 20. Three positioning pins 41 are respectively inserted into the three second through holes 22. One end of the positioning pin 41 is provided with a support flange 411. The support flange 411 is disc-shaped. The end of the positioning pin 41 with the support flange 411 abuts against the air bag 31. The support flange 411 abuts against the air bag 31, thereby further pressing the air bag 31 and supporting the positioning pin 41, which further improves the compactness of the structure.

[0042] The other end of the positioning pin 41 is movably connected to the steering wheel frame 1, thereby facilitating the pressing of the vehicle airbag assembly. This causes the conductive contacts on the internal horn structure to move downwards and contact the lower conductive contacts, enabling current conduction and emitting the necessary audible signal to warn pedestrians and attract the attention of other vehicles, ensuring traffic safety. A shock-absorbing pad 412 and a buffer spring 413 are mounted on the positioning pin 41. The shock-absorbing pad 412 and the buffer spring 413 are adapted to the second through hole. The shock-absorbing pad 412 and the buffer spring 413 are mounted on the positioning pin 41, with the buffer spring 413 located closer to the housing 20 and the shock-absorbing pad 412 located away from the housing 20. The shock-absorbing pad 412 and the buffer spring 413 can buffer and reduce vibrations transmitted from the vehicle chassis to the airbag assembly, avoiding vibration noise and improving driving comfort.

[0043] Figure 5 This is a schematic diagram of the structure of the conductive sheet in an embodiment of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the conductive sheet in an embodiment of the present invention. Figure 2 .

[0044] like Figure 4 , Figure 5 as well as Figure 6As shown, the speaker conductive circuit assembly 40 also includes a conductive sheet 42 and a wire harness 43. The conductive sheet 42 is disposed on the stud 321, and one end of the wire harness 43 is connected to the stud 321, while the other end of the wire harness 43 is connected to the positioning pin 41. The conductive sheet 42 includes a first protrusion 421, a second protrusion 422, and a connecting plate 423. One side of the connecting plate 423 is connected to the first protrusion 421, and the other side of the connecting plate 423 is connected to the second protrusion 422, making the conductive sheet 42 have a U-shaped structure. This ensures that when the conductive sheet 42 is disposed on the stud 321, it will not interfere with other components, thereby further improving the compactness of the structure. A connecting ring 424 is provided on the first protruding plate 421. The connecting ring 424 is adapted to the stud 321 and is sleeved on the stud 321, so that the conductive sheet 42 is connected to the stud 321. The connecting ring 424 is located between the housing 20 and the nut 322, thereby fixing the conductive sheet 42, preventing the conductive sheet 42 from shaking, ensuring the stability of the conductive sheet 42, and ensuring the normal operation of the speaker conductive circuit assembly 40. In addition, the structure of the conductive sheet 42 in this invention is simple. When the conductive sheet 42 is manufactured by sheet metal stamping process, the utilization rate of sheet metal parts can be improved, and the production cost can be effectively reduced.

[0045] Figure 7 This is a schematic diagram of the assembly of the conductive sheet and the housing in an embodiment of the present invention; Figure 8 yes Figure 7 A magnified view of part A in the middle; Figure 9 yes Figure 8 Schematic diagram of the structure at section BB; Figure 10 yes Figure 9 A schematic diagram of the CC section.

[0046] like Figure 7 , Figure 8 , Figure 9 as well as Figure 10 As shown, the housing 20 is provided with a mounting guide groove 23, which is adapted to the connecting plate 423. The connecting plate 423 passes through the mounting guide groove 23, thereby fixing the connecting plate 423 and further fixing the conductive sheet 42, preventing the conductive sheet 42 from shaking, ensuring the stability of the conductive sheet 42, and ensuring the normal operation of the speaker conductive circuit assembly 40.

[0047] Figure 11 This is a schematic diagram of the steering wheel frame structure in an embodiment of the present invention; Figure 12 This is a partial structural diagram of the steering wheel frame in a top view according to an embodiment of the present invention; Figure 13 This is a partial structural diagram of the steering wheel frame in a bottom view according to an embodiment of the present invention.

[0048] like Figure 11 , Figure 12 as well as Figure 13As shown, the steering wheel frame 1 is provided with retaining springs 2. Three retaining springs 2 are set on the steering wheel frame 1, and each of them corresponds to the position of three positioning pins 41. The end of each of the three positioning pins 41 near the steering wheel frame 1 abuts against the retaining springs 2, so that they can be movably locked on the steering wheel frame 1, making it convenient to press the car airbag assembly.

[0049] The cover 10 has an identification groove 11 with an icon 12 inside, which makes it easy to add icons and logos to the car airbag assembly, improving its aesthetics and recognizability.

[0050] In the assembly process of the automotive airbag assembly provided by this invention, icon 12 is installed in the marking groove 11 of the cover 10, the support ring bracket 32 ​​is placed in the clearance space inside the airbag 31, the airbag 31 is heat-pressed and stored, the positioning pin 41 with the shock-absorbing pad 412 and the buffer spring 413 fitted on it is passed through the second through hole of the housing 20, the stud 321 and the positioning pin 41 are connected through the wire harness 43, the stud 321 is passed through the first through hole 21 of the housing 20, and the heat-pressed and stored airbag 31 is installed inside the housing 20. The gas generator 33 is installed between the housing 20 and the air bag 31. The connecting ring 424 is sleeved on the stud 321. The connecting plate 423 is snapped into the mounting guide groove 23. The nut 322 is tightened to fix the conductive sheet 42 to the housing 20. The cover 10 is connected to the housing 20 to obtain the assembled car airbag assembly. The barcode label 3 is then attached to the assembled car airbag assembly and snapped onto the retaining spring 2 by the positioning pin 41. The assembled car airbag assembly is then pressably connected to the steering wheel frame 1.

[0051] The horn conductive circuit assembly 40 is integrated into the vehicle airbag assembly. The conductive plate 42 is electrically connected to the metal support ring bracket 32 ​​via studs 321 and nuts 322. The support ring bracket 32 ​​is connected to the positioning pin 41 via a wiring harness 43, and is secured to the steering wheel frame 1 via the positioning pin 41, thus connecting the vehicle airbag assembly to the steering wheel. The lower contact structure of the horn contacts the positioning pin 41 and is grounded through the steering wheel frame 1. The upper contact of the horn is connected to the positive terminal of the vehicle via the wiring harness 43 and the conductive plate 42 via the clock spring plug. There is a shock-absorbing pad 412 and a buffer spring 413 between the vehicle airbag assembly and the steering wheel frame 1. When the driver presses the vehicle airbag assembly, the upper and lower contacts of the horn make contact, enabling the horn to conduct and sound. When the driver releases the pressure on the vehicle airbag assembly, the buffer spring 413 springs up, the vehicle airbag assembly resets, the horn circuit is disconnected, and the horn sound is turned off.

[0052] This invention cleverly utilizes the structure of the car airbag assembly and steering wheel frame 1 to form the conductive circuit of the horn switch, which can significantly reduce the complexity of the car airbag assembly and horn switch structure, reduce the weight and structural complexity of the horn switch structure. Due to the reduced structural complexity, the driver's airbag can also be designed to be smaller, with reduced cost, weight, and space occupation.

[0053] The role and effect of the embodiments

[0054] The automotive airbag assembly provided by this invention is mounted on the steering wheel frame 1 of an automobile. The automotive airbag assembly includes a cover 10, a housing 20, an airbag assembly 30, and a horn conductive circuit assembly 40. The cover 10 is connected to the housing 20, and the housing 20 is mounted on the steering wheel frame 1. The airbag assembly 30 is located between the cover 10 and the housing 20, and the horn conductive circuit assembly 40 is located on the airbag assembly 30. This facilitates assembly. Compared with the housing assembly using sheet metal stamping and PA66 plastic coating process, it reduces the complexity of the housing assembly parts and molds, reduces the scrap rate of parts, effectively utilizes space, effectively avoids the horn conductive circuit assembly 40 occupying a large space, and improves the structural compactness of the automotive airbag assembly. The horn conductive circuit assembly 40 is integrated into the vehicle airbag assembly. The conductive plate 42 is electrically connected to the metal support ring bracket 32 ​​via studs 321 and nuts 322. The support ring bracket 32 ​​is connected to the positioning pin 41 via a wiring harness 43, and is secured to the steering wheel frame 1 via the positioning pin 41, thus connecting the vehicle airbag assembly to the steering wheel. The lower contact structure of the horn contacts the positioning pin 41 and is grounded through the steering wheel frame 1. The upper contact of the horn is connected to the positive terminal of the vehicle via the wiring harness 43 and the conductive plate 42 via the clock spring plug. There is a shock-absorbing pad 412 and a buffer spring 413 between the vehicle airbag assembly and the steering wheel frame 1. When the driver presses the vehicle airbag assembly, the upper and lower contacts of the horn make contact, enabling the horn to conduct and sound. When the driver releases the pressure on the vehicle airbag assembly, the buffer spring 413 springs up, the vehicle airbag assembly resets, the horn circuit is disconnected, and the horn sound is turned off. This invention cleverly utilizes the structure of the car airbag assembly and steering wheel frame 1 to form the conductive circuit of the horn switch, which can significantly reduce the complexity of the car airbag assembly and horn switch structure, reduce the weight and structural complexity of the horn switch structure. Due to the reduced structural complexity, the driver's airbag can also be designed to be smaller, with reduced cost, weight, and space occupation.

[0055] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A car airbag assembly, mounted on the steering wheel frame (1) of a car, characterized in that, The steering wheel assembly includes a cover (10), a housing (20), an airbag assembly (30), and a horn conductive circuit assembly (40). The cover (10) is connected to the housing (20), which is mounted on the steering wheel frame (1). The airbag assembly (30) is positioned between the cover (10) and the housing (20). The horn conductive circuit assembly (40) is mounted on the airbag assembly (30). The airbag assembly (30) includes an airbag (31) and a support ring bracket (32). The support ring bracket (32) is provided with studs (321), which are evenly distributed on the support ring bracket (32). The housing (20) is also provided with a second through hole (22). The horn conductive circuit assembly (40) includes a positioning pin (41), which passes through the second through hole (22). One end of the positioning pin (41) is provided with a support flange (4). 11), one end of the positioning pin (41) abuts against the air bag (31), the positioning pin (41) is provided with a shock-absorbing pad (412) and a buffer spring (413), the horn conductive circuit assembly (40) also includes a conductive sheet (42) and a wire harness (43), the conductive sheet (42) is disposed on the stud (321), one end of the wire harness (43) is connected to the stud (321), the other end of the wire harness (43) is connected to the positioning pin (41), the conductive sheet (42) includes a first convex plate (421), a second convex plate (422) and a connecting plate (423), one side of the connecting plate (423) is connected to the first convex plate (421), the other side of the connecting plate (423) is connected to the second convex plate (422), the first convex plate (421) is provided with a connecting ring (424), the connecting ring (424) is sleeved on the stud (321).

2. The automotive airbag assembly according to claim 1, characterized in that, The air bag (31) is housed in a ring shape, with a clearance space in the middle of the air bag (31). The support ring bracket (32) is set in the clearance space, and a gas generator (33) is provided on the support ring bracket (32).

3. The automotive airbag assembly according to claim 2, characterized in that, The housing (20) is provided with a first through hole (21) that is adapted to the stud (321). The stud (321) passes through the first through hole (21), and a nut (322) is provided at one end of the stud (321) near the first through hole (21).

4. The automotive airbag assembly according to claim 3, characterized in that, The housing (20) is provided with an installation guide groove (23), and the connecting plate (423) passes through the installation guide groove (23).

5. The automotive airbag assembly according to claim 4, characterized in that, The steering wheel frame (1) is provided with a retaining ring (2), and the positioning pin (41) abuts against the retaining ring (2).

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